Fosfomycin is for oral administration and should be taken on an empty stomach, either 1 hour before or at least 2 hours after meals and preferably before bedtime after emptying the bladder. The contents of a sachet should be dissolved in a glass of water and taken immediately after its preparation.
from google
pero mas concern ko po na hindi sya natake from the time na nireseta, antibiotic po kasi sya.